Typewriting machine



June 13, 1933. G. G. GOING TYPEWRITING MACHINE 3 Sheets-Sheet 1 FiledJune 9. 1931 v/// M Q W Sm INVENTOR e2 & 9

Byway W ATTORNEY 3 Sheets-Sheet 2 s V IN June 13, 1933. e. a. someTYPEWRITING MACHINE Filed June 9, 1931 WITNESSES June 13, 1933. e. G.some TYPEWRITING MACHINE 3 Sheets-Sheet 3 Filed June 9, 1931 ATTORNEYPatented June. 13, 1933 i ITED STATES PATENT OFFICE enonen a. some, orGLEnBnooK, oonnncrmunnssrenon TO REMINGTON RAND ING.,

on NEW YORK, n. Y.', Aconronnrron or DELAWARE TV'YPEWRITING MACHINEApplication filed June 9, 1931. Serial fie. 543,057.

My invention relates to typewriting and like machines and moreparticularly to paper feed mechanism therefor;

Much difficulty has been experienced heretofore inprovnlmg an eflicientpaper feed mechanism due to the fact that one or more has been foundthat the ordinaryloosely mounted feed rollers apparently will turnfreely and sometimes advance the outermost work sheets relatively to theunderlying sheets nearer the'platen. Various means have been proposed toovercome these difficulties.

. When an increased pressure is exerted onthe feed rollers, aside fromthe question ofthe effectiveness of this method of overcoming thedifficulties, tracking from the carbon sheets is apt to result,especially .WhQII' SOflQ carbons are employed. 7 I Y i It is one ofthemain objects of my present invention to overcome the above mentioneddifficulties and to provide paper feed mech-' anism which will be highlyefficient under the varying conditions of use and to properly feedthepaper without creeping and without tracking, whether a single sheet or alarge number of sheets with interposed carbonsbe employed.

Astill further object of my invention is to provide variable speedtransmission devices in the driving connectlons between the feed rollersand the platen that will automatically varythe speed at which the feedrollers are driven from the platen, depending on,

the number of sheets being fed together between the feedrollers and theplaten.

Anotherobject of my invention is to provide such .a construction as thatreferred to above in Which the feed rollers may be moved a at will byhand into and out of contact with the platen (or a paper thereon)without interferencefrom said variable speed transmission devices. V

Still another object of my invention is to providetwo independent setsof feed rollers with separate and distinct driving connec- .tions of thecharacter referredto above between each. set of feed rollers and theplaten, a single feed roller releasing device being effectivenevertheless to simultaneously release both sets of feed rollers.

To the above and other ends which will hereinafter appear my inventionconsists of the features of construction, arrangements of parts andcombinations of devices set forth in the following description andparticular; 1y pointed out in the appended claims.

In the accompanying drawings, wherein like reference characters indicatecorrespondingparts in the different views,

Fig. 1 is an enlarged, detail, fragmentary, end elevation with parts insection of the carri age of a typewriting machine equipped with thedevices of my invention. r Fig. 2 is an enlarged, detail, fragmentary,sectional view of the same, the section being taken on the line 2-2 ofFig. 3 and looking in the direction of the arrows at said line.

is a like fragmentary, detail, sectional view of the construction, thesection being taken on the line 23-3 of Fig. 1 and %ooking in thedirection of the arrows at said me. i i i Fig. 4 is a view correspondingto Fig.1 but showing a modified form of construction;

Fig. 5 is an enlarged, detail, fragmentary, sectional view of a portionof the construc tion shown in Fig. 4, the sectionbeing taken on theline5-5 of Fig. 4 and looking in the directionof the arrows at said line.

Fig. 6 is an enlarged, detail, fragmentary, front elevation, partly insection,-of a portion of the modified form of construction illustratedin Fig. 4.

In the present instance I have shown my invention embodied in thecarriage of. a No. 6

RemingtonNoiseless typewriting machine,

although it should be understood that the inare likewise received ingrooved raceways 4..

in a supporting or cross bar of the carriage. The carriage is thussupported for traveling movement across the top plate from side to sideof the machine. Carriage end plates 6 are fixedly secured to thesupporting bar 5 near the ends thereof and are provided with bearings tosupport a cylindrical platen 7.

Inthe present instance I have illustrated two sets of main paper feedrollers, the forward feed rollers 8 and the rear feed rollers 9. Thesefeed rollers extend through openings in a combined paper table and apron10 carried by the carriage in the usual manner, the rollers bearingagainst and coacting with the platen or the work sheets thereon. Iprefer to make the rear feed rollers 9 of larger diameter than the frontfeed rollers 8. The

forward feed rollers are fixedly mounted on a shaft 11 which is receivedin open mouthed bearings 12 in a pair of supporting arms 13 pivoted on asupporting rod or pivot 14 for pivotal movement. Each of the arms 13extend rearward beyond the pivot rod 14 and overlies a rock shaft 15supported in bracket arms 16 secured to the cross bar 5 of the carriage.A flat face 17 on the rock shaft coacts with each of the rearwardlyextended arms 13 to cam the latter and move the feed rollers 8 away fromthe platen when the shaft 15 is rocked. One end of the shaft 15 isextended upward to provide a crank arm 18 to which a link 19 is pivotedat 18, the upper end of said link being pivoted at 20 to one arm of anangular releasing lever 21 pivoted at 22 on an end plate 6 of thecarriage. The upright arm of the angular lever 21 is provided with afinger piece by which said lever may be actuated to rock the shaft 15and effect a release of the feed rollers.

The rear feed rollers 9 are fixedly mounted on a shaft 23 received inopen mouthed bearings 24 in a pair of angular levers 25 supported forpivotal movement on the pivot rod 14.

A cross bar 26 unites the supporting arms 13 and a corresponding crossbar 27 unites the levers 25 by which the rear feed rollers 9 aresupported. These two cross bars26 and 27 are connected intermediatetheir ends by a coiled contractile spring 28. The connection between thecoiled spring 28 and the cross bar 26 is effected by merely looping theforward end of the spring, as indicated at 28, around said cross bar.Connection between the rear end of the spring 28 and the cross bar 27 iseffected by passing the looped rear end of the spring through openingsin a yoke-like member 29 that surrounds the rod 27 and receives a nut 30between the arms of the yoke. A screw 31 is threaded into the nut 30 andbears at its forward free end against the cross bar 27, thus providingadjusting means for varying the tension of the spring 28 and of courseproviding an adjustable connection between the cross bar 27 and thespring. This construction is similar to that employed in the No. 6Remington Noiseless machine and has all of the advantages of suchconstruction.

Each of the angul. r levers 25 is provided with a rearwardly extendingarm 25 at the lower end thereof. Each of these arms 25 underlies therock shaft 15 and co-acts with a flattened face 32 there-on so that whensaid shaft is rocked both sets of feed rollers will be moved away fromthe platen. It will be understood from the foregoing that the singlespring 28 is effective to move both sets of feed rollers 8 and 9 againstthe platen with a balanced pressure.

I will now describe the means for driving the rear set of feed rollers 9from the platen through intermediate driving connections that includevariable speed transmission devices.

At eachend of the platen there is secured a disk 33 by means of screws34. Each disk is concentric with the platen and is provided at the edgethereof with a laterally projecting flange 35 that constitutes a drivingmember for the feed rollers. The contact surface of each flange 35coacts with a driven member or cone designated as a whole by the reference numeral 36. As best illustrated in Fig. 3 the driving member 36in each instance is a double cone wheel comprising an inner section 36'and an outer section 36 Each driven member 36 is loosely mounted on aninclined stub shaft 37 which projects radially towards the axis oftheplaten from a hub .38 loosely mounted on the shaft 23 on which the feedrollers 9 are fixedly mounted. A headed screw 39 is received in a tappedopening in each end of the shaft 23 and holds the associated hub 38against outward axial, movement on the shaft 23. Movement of each hub inthe opposite direction along the shaft is prevented by a bevel gear 40fixed on the shaft 23 by a set screw 41. The teeth 42 of each bevel gear40 mesh with teeth 43 provided at the lower end of the associated drivenmember 36, said teeth 43 constituting a bevel gear that forms part ofsaid member. A spring-pressed split ring 44 is received in a peripheralgroove 45 in each stub shaft 37 to prevent accidental upwarddisplacement of the companion member 36 on said stub shaft. By incliningeach shaft 37 in the manner shown in Fig. 3, I am enabled to bring thecontact face of the upper section 36 of the associated driven cone,

which coacts with a driving member 35 on the platen, parallel therewith.When,there fore, each member 36 receives a bodily radial movementrelatively to the platen, as it does when the feed rollers 9 are movedtowards and from the platen, the associated driving flange will act at ahigher or lower point on the cone wheel without, however, disturbing therelation thereof laterally with reference to the contact surface of theassociated flange 35. It will be understood of course that thesevariable speed transmission devices at both ends of the platen vary thespeed of the feed rollers 9 depending on the distance of the feedrollers from the surface of the platen. Rotative movement of the platenis transmitted toeach member 36,and through the companion bevel gears43,40 to the shaft 23' to turn the feed rollers 9. The parts aresoproportioned that the driving of the feedrollers 9 in this mannerwillbe at a rate .of surface speed corresponding to the outermost work sheetemployed on the platen. If but a single sheet be employed,

the surface speed of the rollers 9 will correspond substantially to thatof the platen, whereas if a number ofwork sheets with in terposedcarbons are employed, the variable speed transmission devices willautomatically determine the rate of surface speed of the feedrollers 9so that it'will accord with the surface speed of the outermost worksheet, or the increased diameter of the platen brought about by theemployment of such stack of work sheets and interposed carbons.

Inorder topreventcones 36 from being carried along with the drivingdevices 35 and to maintain the shafts 37 against displacement around theaxis of the shaft 23,

.I provide for each cone aspring pressed ret aining devicewhichcomprises a flexible arm 46 held by a screw 47 to a post 48 on aside plate 6 of the carriage. In order to prevent a pivotal movement ofeach flexible arm 46 around the screw 47 I aperture each arm 46. Thelower end of each member 46 is bent to form a yoke-like supportingportion 54 between the arms of which are pivoted two anti-frictionrollers 55. These rollers, as will be understood from an inspection ofFig. 2, bear against and embrace the cone section or portion 36 ofthecompanion member 36 on opposite sides of the stub shaft 37.

The pressureof each spring 53 is therefore not only exerted on.thcassociated cone to lever 25 and secured thereto by screws 57 and 58.An arm 59 on each bracket 56 is apertured to provide a bearing in whicha reduced portion of the shaft23 is received.

This provides an outwardly extending support from each lever 25toconnect the outer end portion of the shaft 23 thereto, and provides'an efficient connection at these points for supporting said shaft andcarrying the driving gear connections between the shaft andthe cones 36together with the latter in the movement of the feed rollers 9 towardsand from the platen.

For reasons which will hereinafter more clearly appear, I prefer toemploy separate drivingconnections between the platen and the rear feedrollers 9, and between the platen andthe front feed rollers 8. When itis remembered that the'feed rollers of these two sets are of differentdiameters it will be understood that the samedriving connections betweenthe feed rollers of one set and the platen could not be utilized fordriving the feed rollers of the other set, especially when it is bornein mind that there are provided variable feed transmission devices ineach instance. 7

- The front feed rollers 8 are driven from the platen by the samecharacter of. means ashereinbefore described with reference to the rearfeed rollers 9, and correspondlng parts in both sets of drivingconnections will be designated by the same reference numerals. Foreffectively supporting the shaft '11 ofthe front set of feed rollersthere is provided on each supporting arm 13 an additional bracket arm 60that is bifurcated at its lower end 61 to straddle the pivot rod 14.

A screw 62 fixedly connects each arm 60 to its companion supporting arm13 by which the shaft 11 is carried. Each bracket arm 60 is off-setoutwardly at60 and is provided with a closed bearing in which the shaft11 is supported. Each arm 60 is apertured at 63 to receive the companionreduced end 26 of the cross bar 26 therein. Preferably the pivot'rod 14has riveted to each end thereof a washer 64 flattened at its lower side,as

indicated at 65, to receive abearing on the supportingibar 50f thecarriage. From an inspection of Fig. lit will be understood that each ofthe flexible members 46 forthe front feed rollers is inclineddownwardand rearward to the supporting post and screw 47 on which it issecured, whereas each of the flexible supporting members 46 for the rearfeed rollers is inclined upward and rearward to its supporting post andscrew 47. In each instance, however, the axial movement of the cone 36is radial of the platen towards and from the axis thereof. This movementof course, in both instances, is brought about by the increase ordecrease of the number of work sheets and interposed carbons employed.

In the modified form of the construction disclosed in Figs. 4, 5 and 6the principal distinction is in the cones and the manner of mounting andcontrolling the same. Referring more particularly to Fig. 5 it will beseen that each of the driven members for the shaft 23 of the rear set offeed rollers 9 is in the nature of a single cone 66 mounted on a stubshaft 67 that projects from a hub 68 towards the axis of the platen.Each hub 68 surrounds a reduced end portion of the shaft 23 and isprovided with a rocker bearing 69 that enables the hub to receive aslight rocking motion on the shaft to facilitate the movement of thecompanion stub shaft 67 towards and from the adjacent end of the platen.This is in order to afford a slight rocking motion of the stub shafts 67on the shaft 23 as the face of each cone moves on its flange 35 duringthe movement of the feed rollers 9 towards and from the face of theplaten, and as the higher or lower portion of the cones contact withsaid flanges. The lower end of each driven member carrying a cone 66 isprovided with a bevel gear 70 that meshes with another bevel gear 71,the hub 72 of which is fixed to a reduced portion of the shaft 23 by setscrews 73. It will be understood that a meshing engagement is maintainedbetween the bevel gears 70 and 71 irrespective of the slight teeteringside motion of the cones as the latter are moved towards and from theaxis of the platen.

In this modified construction each of the cones is maintained ineffective contact with its flange 35 by a plunger 74 recessed at itsinner end at 75 to form a seat for the upper end of the companion stubshaft 67 and to partly surround and embrace the latter. Each plunger 74has a reduced stem 76 received in a guide sleeve 77, screw threaded at78 where it is received in a tapped opening in the companion end plate 6of the carriage. A coiled expansion spring 79 surrounds a reducedportion 80 of each guide sleeve 77 and bears at one end againstthe'companion plunger 74. The force of each spring is exerted againstthe companion stub shaft 67, thus forcing the cone carried thereby intoeffective frictional contact with its flange 35. It will be understoodthat an adjustment cf each guide sleeve 77 in its tapped opening willvary the force exerted by the companion spring 79 on its cone. It alsowill be under stood that by seating the end of each stub shaft ,67 inthe recess in the associated plunger in the manner described, provisionis made for preventing the companion stub shaft and the cone supportedthereby from turning around the axis of the shaft 23. A collar 81 issecured to each end of the shaft 23 by a set screw 82 to prevent anoutward displacement of the hubs 68 along the shaft. Each bevel gear 71is recessed at 83 to permit a slight rocking motion of the companion hub68 as its stub shaft is rocked towards and from the end of the platen.

From an inspection of Fig. 4 it Will be seen that the same character ofdriving connections that are employedbetween the platen and the feedrollers 9, also are employed between the platen and the feed rollers 8,except that the gearing in each case is proportioned for properlydriving either the feed rollers 9 or the smaller feed rollers 8. Theremainder of this modified form of the construction is similar to thathereinbefore described and such description need not be repeated.

It will be. understood of course that an operation of the release lever21 is effective not only to release the feed rollers 9 in the mannerhereinbefore indicated, but also will simultaneously effect a release ofthe forward set of feed rollers 8.

From certain aspects of my invention I prefer to employ the constructiondisclosed in Figs. 1, 2 and 3 inasmuch as the variation at which thefeed rollers are driven may be brought about without rocking the stubshafts 37 as is necessary with the stub shafts 67 in the modified formof the construction. However, there are certain advantages inherent inthe modified form of construction shown in Figs. 4, 5 and 6, in that thedevices may be confined within a smaller space intermediate the endplates 6 of the carriage and the ends of the platen than is the case inthe form of construction shown in Figs. 1, 2 and 3. In some machinesthis is an important factor.

It will be understood that in accordance with the present invention itis possible to materially reduce the spring force ordinarily exerted onthe feed rollers and yet effectively drive the feed rollers from theplaten always at the same surface speed as the outermost sheetirrespective of the number of work sheets and interposed carbon sheetsemployed. The effect of this is to reduce to a minimum, or in fact toeliminate entirely, tracking, and at the same time produce a moreeffective feed than is possible with the mere loosely mounted feedrollers.

By the present invention I am enabled to provide an effective feed ofthe paper under all the varying conditions of use. For example, asidefrom what has been hereinbea turn feed of the platen.

fore pointed out, the operator is enabled to turn backthe platen forcorrection with the assurance that there will be no slipping of the worksheets one on. another and that the paper will be accurately returned tothe proper position during the forward or re- The fact that the feedrollers are at all times in geared connection withthe platen enablessuch feed rollers to counteract any tendency of the outermost work sheetor sheets to slip or creep, it being understood that such tendency isgreatest at the outermost sheet or sheets. Moreover, due to the samegeared connection the feed rollers cannot sp n freely as in the ordlnaryconstruction wherein loosely disposed feed rollers are employed, but arealways held to a surface springs 53 or 79 against the platen, whereas iftheforce of such springs be exerted on one end only of the platen theywould tend to force the platen axially in one direction againstitsbearings with undue force and render the platen harder to turn;

Various changes maybemade in the con struction, and certain featuresthereof may be employed without others, withoutdeparting from myinvention as it isdefinedin the accompanying claims;

What I claim as new and desire to secure by Letters Patent, is:

1. The combination of a cylindrical platen, paper feed rollers, andintermediate driving connections between the platen and said feedrollers including means for varying the speed at which said feed rollersare driven from the platen in accordance with the variation in thediameter of the platen due to the increased or decreased thickness ornumber of the work sheets on the platen.

2. The combination of a cylindrical platen, paper feed rollers,intermediate driving connections between the platen and said feedrollers including automatically operating means for varying the speed atwhich said feed rollers are driven from the platen in accordance withthevariation in the diameter of the connections between the platen andsaid feed rollers including variable speed transmission devicesshiftable by a movementof said feed rollers to and from the platen tovary the speed of the feed rollers depending on the distance of the feedrollers from the platen.

4. The combination of a cylindrical platen,

paperfeed rollers, and intermediate driving connections between theplatenand said feed rollers including variable speed transmissiondevices comprising a driving element on the platen, a cone wheelcooperative therewith, means for turning said feedrollers from said conewheel, and means for varying the position of said conewheel relativelyto said driving: element as the feed rollers move to and from theplaten.

5. The combination of a cylindrical platen, paper feed rollers, andintermediate driving connections between the platen and said feedrollers including variable speed transmission devices comprising adriving element on the platen, a cone wheel "cooperative therewith,

toothed gearing between said cone wheel and feed rollers for drivingthelatter from said cone wheel, and means for varying the position of saidcone wheel relatively to said driving element as the feed rollers moveto and i from the platen. a a it 6. The combination of acylindricalplaten, paper. feed rollers, and intermediate driving connectionsbetween the platen and said feed rollers including variable speedtransmission devices comprising a driving element on the platen, a conewheel cooperative therewith, meansfor turning sald feed rollers fromsaid conewheel, means for varying the position of said cone wheelrelatively to said driving element as the feed rollers move to and fromthe platen, and spring means for maintaining a cooperative engagementbetween said cone Wheel and driving element irrespective of thevariation in the position of the cone wheel relatively to said drivingelement.

7 The combination of a cylindrical platen, paper feed rollers, andintermediate driving connections between the platen and said feedrollers including a circular driving member on one end of theplatendisposed concentricallywith the axis thereof, a driven n1emberdisposed radially of the platen and hav ing a cone wheel carried therebywhich coacts with said driving member, driving connections between saiddriven member and feed rollers, and means for mounting said drivenmember and feed rollers for bodily movement together as the feed rollersmove towards and from the platen, whereby the speedat which the feedrollers aredriven from the platen will vary depending on the position ofthe platen. a a l 8. The combination of a cylindrical platen, paper feedrollers, and intermediate driving connections between the platen andsaid feed feed rollers relatively to the p rollers including a circulardriving member on one end of the platen disposed concen trically withthe axis thereof and having a frictional contactface, a driven memberdisposed radially of the platen andhaving a friction cone wheel carriedthereby which coacts with the friction surfaceof said driving 'member,driving connections between said driven member and feed rollers, meansfor mounting said driven member and feed rollers and driving connectionsfor bodily movement together as the feed rollers move towards and fromthe platen, and spring means for maintaining said cone wheel and drivingmember in frictional engagement, whereby the speed at which the feedrollers are driven from the platen will vary depending on the positionof thefeed rollers relatively to the platen.

9. The combination of a cylindrical platen, paper feed rollers, andintermediate driving connections between the platen and said feedrollers including acircular driving member on one end of the platendisposed concentrically with the axis thereof, a driven member disposedradially of the platen and having a cone wheel carried thereby whichcoacts with said driving member, means for mounting said driven memberfor longitudinal and also for lateral movement, spring means bearingagainst said driven member to press it laterally and maintain anelfective driving engagement between said cone wheel and the circulardriving member, driving connections between said driven member and feedrollers, and means by which a movement of the feed rollers to and fromthe platen will shift said driven member longitudinally and vary thespeed at which the feed rollers are driven from the platen depending onthe movement of the feed rollers to and from the platen.

10. The combination of a cylindrical platen, paper feed rollers, andintermediate driving connections between the platen and said feedrollers including a circular driving member on one end of the platendisposed concentrically with the axis thereof, a driven 1 memberdisposed radially of the platen and having a cone wheel carried therebywhich coacts with said driving member, means for mounting said drivenmember for longitudinal and also for lateral movement, spring meansbearing against said driven member to press it laterally and maintain aneffective driving engagement between said cone Wheel and the circulardriving member, bevel gearing between said driven member and feedrollers, and means for mounting said feed rollers, driven member andbevel gearing for movement together in the movement of the feed rollersto and from the platen, whereby the speed at which the feed rollers aredriven from the platen will vary depending on the position of the feedrollers relatively to the platen.

11. The combination of a cylindrical platen; paper feed rollers;intermediate driving connections between the platen and said feedrollers including means for varying the speed at which said feed rollersare driven from the platen in accordance with the variation in thediameter of the platen due to the increased or decreased thickness orthe number of the work sheets on the platen; a second set of feed rolles; and like independently operable driving connections between saidsecond set of feed rollers and the platen.

12. The combination of a cylindrical platen; paper feed rollers;intermediate driving connections between the platen and said feedrollers including means for varying the speed at which said feed rollersare driven from the platen in accordance with the variation in thediameter of the platen due to the increased or decreased thickness orthe number of the work sheets on the platen; a second set of feedrollers; like independently operable driving connections between saidsecond set of feed rollers and the platen; and hand actuated controllingmeans operable at will forshifting all of said feed rollers into and outof contact with the'platen or the paper thereon without interferencefrom said intermediate driving connections.

13. The combination of a cylindrical platen; paper ieed rollers;intermediate -:lri ing connections between the platen and said feedrollers including variable speed transmission devices shiftable by amovement of said feed rollers to and from the platen to vary the speedof the feed rollers depending on the distance of the feed rollers fromthe platen; a second set of feed rollers; and like separate and distinctvariable speed transmission devices between said second set of feedrollers and the platen.

14. The combination of a cylindrical platen; paper feed rollersintermediate driving connections between the platen and said feedrollers including variable speed transmission devices shiftablc by amovement of said feed rollers to and from the platen to vary the speedof the feed rollers depending on the distance of the feed rollers fromthe platen; a second set of feed rollers; like separate and d stinctvariable speed transmission devices between said second set of feedrollers and the platen; and hand actuated controlling means operable atwill for shifting all of said feed rollers into and out of contact withthe platen or the paper thereon without interference from said variablespeed transmission devices.

15. The combination of a cylindrical platen; paper feed rollers;intermediate driving connections between. the platen and said feedrollers including variable speed transmission devices comprising adriving element rollers and said circular driving member.

on the platen, a cone wheel cooperative therewith, means for turningsaid feed rollers from said cone wheel, andmeans for varying theposition of said cone wheel relatively to said driving element as thefeed rollers move to and from the platen; a second set of paper feedrollers.- and like se )arate and disl u I r tmct variable speedtransnnssion devices bea on one end of the platen disposedconcentrically with the axis thereof, a driven member disposed radiallyof the platen and having a cone wheel carried thereby which coacts withsaid driving member, driving connections between said driven member andfeed rollers, and means for mounting said driven member and feed rollersfor bodily movement together as the feed rollers move towards and fromthe platen, whereby the speedat which the feed rollers are driven fromthe platen will vary depending on the position of the feed rollersrelativelyto the platen; a second set of feed rollers; and like separateand distinct intermediate driving connections between said second set offeed rollers and said circular driving member.

17. The combination of a cylindrical platen; paper feed rollers;intermediate driving connections between the platen and saidfeed rollersincluding a circular driving member on one end of the platen disposedconcentrically with the axis thereof, a driven member disposed radiallyof the platen and having a cone wheel carried thereby which coacts withsaid driving member, means for mounting said driven member for longitudinal and also for lateral movement, spring means bearing against saiddriven member to press it laterally and maintain an effective drivingengagement between said cone wheel and the circular driving member,driving connections between said driven member and feed rollers, andmeans by which a movement of the feed rollers to and from the platenwill shift said driven member longitudinally and vary the speed at whichthe feed rollers are driven from the platen depending on the movement ofthe feed rollers to and from the platen; a second set of paper feedrollers; and like separate and distinct driving connections between saidsecond set of feed 18. The combination of a cylindrical platen, paperfeed rollers, and intermediate driving connections between the platenand said feed rollers including variable speed transmission devicescomprising a driving element from said cone wheel, and means for varyingthe position ofsaid cone wheel relatively to said driving element as thefeed rollers move toand from the platen, the line of contact on saidcone wheel being parallel with the plane of the contact :face of saiddriving element with which the cone wheel coacts.

19. The combination of a cylindrical platen, pap-er feed rollers, andintermediate driving connections between the platen and said feedrollers including variable speed transmission devices comprisingadrivingelement on the platen, a cone wheel cooperative therewith, meansfor turning said feed rollers from said cone wheel, means for varyingthe position of said cone wheel relatively to said driving element asthe feed rollersmove to and from the platen, spring means for maintaining a cooperative engagement between said cone wheel and drivingelement irrespective of the variation in the position of the cone wheelrelatively to said driving element, and adjusting means for varying theforce exerted by said spring means.

20. The combination of a cylindrical platen, paper feed rollers, andintermediate drivlng connections between the platen and said feedrollers including variable speed transmission devices comprising adriving element on the platen, a cone wheel cooperative therewith, meansfor turning said feed r011 5 ers from said cone wheel, means for varyingthe position of said cone wheel relatively to said driving element asthe feed rollers move to and from the platen, spring means formaintaining a cooperative engagement between said cone wheel and drivingelement lrrespective of the variation 1n the position of the cone wheelrelatively to said driving element, and means associated with, saidspring means for holding said cone Wheel against traveling movement withsaid driving element. 1

21. The combination of a cylindrical platen; paper feed rollers;intermediate driving connections between the platen and said feedrollers including means for varying the speed at which said feed rollersare driven from the platen in accordance with the variation in thediameter of the platen due to the increased or decreased thickness orthe number of the work sheets 011 the platen; a second set of feedrollers that are of a difi'erent diameter from the first mentioned paperfeed rollers; and like independently operable driving connectionsbetween said second set of feed rollers and the platen, the ratio ofboth sets of driving connections being such that the surface speed ofthe feed roll-ers of both sets will be the same.

Signed at Stamford in the county ofFair- GEORGE G. GOING.

